Database Systems: Design, Implementation, & Management
13th Edition
ISBN: 9781337627900
Author: Carlos Coronel, Steven Morris
Publisher: Cengage Learning
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Chapter 5, Problem 17RQ
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Design trap:
- One of the most common design traps is “fan trap” when the user contains one entity in two one-to-many relationship to another entities that time fan trap is occurred.
- Thus producing an association among other entities that is not expressed in the model.
- When the relationship is identified as incorrect or improper model at that time design trap is occurred.
- So, the design trap is represented in a way that is not consistent with the real world.
Example:
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The reasoning behind each design choice should be made clear. What makes a design "good" as opposed to "bad"?
Define the top-down design approach and describe how it works.
What are your most used design patterns and in what contexts do you use them?
Chapter 5 Solutions
Database Systems: Design, Implementation, & Management
Ch. 5 - Prob. 1RQCh. 5 - What kinds of data would you store in an entity...Ch. 5 - Prob. 3RQCh. 5 - What is a subtype discriminator? Give an example...Ch. 5 - Prob. 5RQCh. 5 - What is a disjoint subtype? Give an example.Ch. 5 - What is the difference between partial...Ch. 5 - Prob. 8RQCh. 5 - According to the data model, is it required that...Ch. 5 - Prob. 10RQ
Ch. 5 - Prob. 11RQCh. 5 - Prob. 12RQCh. 5 - Prob. 13RQCh. 5 - Prob. 14RQCh. 5 - When implementing a 1:1 relationship, where should...Ch. 5 - What is time-variant data, and how would you deal...Ch. 5 - Prob. 17RQCh. 5 - Prob. 1PCh. 5 - Prob. 2PCh. 5 - Prob. 3PCh. 5 - Prob. 4PCh. 5 - Prob. 5PCh. 5 - Prob. 6PCh. 5 - Prob. 7PCh. 5 - Prob. 8CCh. 5 - Prob. 9CCh. 5 - Prob. 10C
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- What exactly is a Prototype Design Pattern?What are the advantages and disadvantages of using the prototype pattern? Explain with an illustration of application.arrow_forwardDescribe the many steps that are a part of the top-down design process.arrow_forwardMention the design pattern that is applicable and the reason in details pleasearrow_forward
- Is there a set of design heuristics that can be used?arrow_forwardMap each of your design subsystem components into a “Pattern-Organization table” For each Design Subsystem component, choose any of the design patterns from your list that are applicable, and modify the UML design architecture if necessary. This subsystem is about user and producer , user can check water usage and producer can check water damage in user systemarrow_forwardWhen it comes to code, what role do Design Patterns play, and how exactly do they function? Explain and illustrate three different design patterns.arrow_forward
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